Sökning: "GICs"

Visar resultat 1 - 5 av 7 avhandlingar innehållade ordet GICs.

  1. 1. Electromagnetic Modelling of Power Transformers for Study and Mitigation of Effects of GICs

    Författare :Seyedali Mousavi; Göran Engdahl; Ebrahim Rahimpour; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; transformer; hysteresis; DC magnetization; GMD; GICs; FEM; reluctance network method; low frequency transients; core losses; winding losses; eddy current losses; transformator; hysteresis; DC; likströmsmagnetisering; GMD; GIC; FEM; reluktansnätverksmodell; lågfrekventa transienter; kärnförluster; lindningsförluster; virvelströmsförluster; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Geomagnetic disturbances that result from solar activities can affect technological systems such as power networks. They may cause DC currents in power networks and saturation of the core in power transformers that leads to destruction in the transformer performance. LÄS MER

  3. 2. Electromagnetic Modelling of Power Transformers with DC Magnetization

    Författare :Seyed Ali Mousavi; Göran Engdahl; S. V. Kulkarni; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Transformer; Hysteresis; DC magnetization; GICs; FEM; reluctance network method;

    Sammanfattning : DC currents that flow through the ground can be injected to the star windings of power transformers from their grounded neutral points and close their path with transmission lines. The geomagnetically induced currents (GICs) and AC/DC convertors of high voltage direct current (HVDC) systems are the sources of such DC currents. LÄS MER

  4. 3. Identification of compounds that target glioma initiating cells

    Författare :Shimei Wee; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Glioblastoma multiforme is a common form of brain tumor that leads to debilitating effects despite the current regiment of treatment, which includes surgery, chemotherapy and radiotherapy. With the discovery of glioma-initiating cells (GICs) that exists within the bulk tumor, some light has been shed on this disease. LÄS MER

  5. 4. Interplay Between Cell of Origin and Oncogenic Activation in Glioma

    Författare :Yiwen Jiang; Lene Uhrbom; Anders Persson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Glioma; PDGF; cell of origin; Sox5; glioma initiating cells; Oncology; Onkologi;

    Sammanfattning : Glioma is the most frequent primary tumor of the central nervous system. By using the RCAS/tv-a mouse glioma model, we have studied mechanisms controlling glioma development and the effect of cell of origin on these processes.SOX5 was identified as a brain tumor locus in a retroviral insertional mutagenesis screen of PDGF-B induced mouse gliomas. LÄS MER

  7. 5. Investigations of Proneural Glioblastoma to Identify Novel Therapeutic Targets

    Författare :Maria Boije; Lene Uhrbom; Bengt Westermark; Rolf Bjerkvig; Uppsala universitet; []
    Nyckelord :Glioma; proneural subtype; hallmarks; glioma initiating cells; S-SOX5; angiogenesis; stromal cells; Tumour biology; Tumörbiologi; Experimentell patologi; Experimental Pathology;

    Sammanfattning : Malignant glioma is a highly lethal and destructive disease with no proper cure. We have investigated some of the hallmarks of cancer in connection to glioma and found ways to disrupt these and prevent tumor growth. The work is done within the context of a glioma subtype distinguished by activation of PDGF signaling termed the proneural subtype. LÄS MER